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The background image shows a fruit fly larva, with its neurons stained in green and its body-wall muscles stained in red. Note the repeating units (sarcomeres) within the muscle fibers and how the neuronal extensions (axons) branch out from the midline and into the muscles to innervate them.  The image represents a 3D stack of multiple optical sections that have been projected in 2D for optimal viewing.

(Image taken by TK Rajendra)